Automatic gas control.



W. C. STANLEY.

AUTOMATIC GAS CONTROL.

APPLICATION FILED JUNE 10, 1918.

L%2,135a Patented Oct. 22, 1918.

WALTER C. STANLEY, 0F WILLOUGHBY, VERMONT.

AUTOMATIC ens CONTROL.

Specification of Letters Patent.

Patented Oct. .22, 1918.

Application filed June 10, 1918. Serial No. 239,147.

To all whom it may concern:

Be it known that I, WALTER C. STANLEY, a citizen of the United States,resid ng at W11- loug'nby, in the county of Orleans, State of Vermont,have invented certain new and useful Improvements in Automatic GasControls; and I do hereby declare the following to be a full, clear, andexact description of the invention, such as will enable others skilledin the art to which it appertains to make and use the same.

This invention is an improvement in gas burners and has particularreference to an automatic eut-ofi device therefor.

An object of the invention is to provide an improved device which isautomatically operated to positively close the stop cook or valve in agas supply pipe should the gas flame of a burner become extinguished yblowing the same out or otherwise, thus providing a safeguard againstexplosions or asphyxiations.

Another object is the provision of a device of this character which issimple in construction, easy to manufacture, readily applicable to gasfixtures and other burners and effective in carrying out the purpose forwhich it is designed.

The inventive idea involved is capable of receiving a variety ofmechanical expressions one of which, for the purpose of illustrating theinvention, is shown in the accompanying drawing wherein Figure l is aside elevation of the device showing the same applied to a gas fixture.

Fig. 2 is a fragmentary view similar to Fig. 1 showing the position. ofparts immediately following the manual adjustment of the stop cock toopened position and the lighting of the gas flame. V

Fig. 3 is an enlarged fragmentary vertical sectional view.

Fig. 4 is a perspective view of the lever attached to the stop cock.

Fig. 5 is a similar view of the rod associated with the lever.

In the drawing, the numeral 10 indicates the vertical pipe of a gasfixture through which the gas is fed to the branch pipe 11' carrying theusual gas tip uponits free end and to which the gas is fed by means ofthe usual stop cock 0r valve 12 which controls the flow of gas throughthe pipe 11.

The cut-off or control device which comprises the essential feature ofthe invention is shown in what is now believed to be its preferred formwhich consists of a horizontal supporting bracket or arm 13 having oneend secured to the pipe 10 and maintained in its supporting position bymeans of the diagonal brace 14 also secured to said pipe wvardly fromthe thermostatic element 15,

the arm 13 has secured thereto'the "upper end of a fulcrum arm 17arranged in a vertical position and having its lower end bifurcated asindicated at 18 to receive the intermediate portions of a lever 19which'is pivoted in said bifurcation as indicated at 20. This lever orrocking element is pivotally connected, at one end, to the dependinglugs 21 of the thermostatic element 15 and is pivoted, at its other end,to a coupling 22 which has a screw threaded opening to receive the upperend of a depending arm or rod 23 whereby a pivotal connection will beestablished between said arm or rod and the rocking element 19. Thelower end of the rod 23 is bent slightly as indicated at 2 1 andextending through said rod in a diagonal direction with respect theretois a pin 25 which projects downwardly to form an acute angle with therod.

The stop cock 12 has associated there with a lever 26 bifurcated in oneend to receive said step cock and attached thereto by means of smallbolts 27, the other end of the lever 26 being beveled as indicated at28. The lever 26 is further provided adjacent the beveled end thereofwith a slot 29 for receiving the lower end of the rod 23 and also forreceiving the pin 25 when the lever is adjusted to a position to permitof the gas being lighted.

In practice, when the parts are in the position shown in Fig. 1, thestop cock 12 is closed and the flow of gas through the pipe 11prevented. In this position, the lower end of the rod 23 extends intothe slot 29 in the lever 26 while the pin 25 engages the beveled end 28of said lever, this also being the position of the parts when the lever26 has been automatically adjusted to close the stop cook 12. When it isdesired to light the burner a slight upward pressure upon the lower endof the rod 23 is exerted thereon to disenga e the pin 25from the beveledend 28 wherehy the lower end of said rod may be swung slightly to theright, as shown in the drawing, and the lever 26 may then I be swungupwardly to open the stop cock l2 and in this movement, the rod 523 willremain stationary, the pin 25 thereof passing 1nto 16 the slot 29. Afterthe flame has been lighted the heat thereof will expand the thermostaticelement and thus rock the end of the lever 19 attached thereto in adownward direction with the result in that an upward pull will 5 beexerted upon the rod 23 and as soon as the lower end of the pin isdisengaged from the slot 29 said rod will swing back to its normalposition With only the lower end 2% thereof engaged in the slot. Nowshould the 0 flame through any reason become extinguished Withoutturning ofi the stop cook 12 the cooling of the element 15 will cause acontraction thereof which will operate the lever 19 in the oppositedirection to exert a 25 downward pressure upon the rod 23 Whereupon thepin 25 will again engage the beveled end 28 and force the lever 20downwardly to turn the stop cool: 12 to its closing position and in thismanner the automatic 3e prevention of. any flow of gas through the pipe11 will be ed'ectively executed.

What is claimed is In a device of the character described, thecombination with a gas supply pipe and a stop cock for regulating theflow of gas therethrough, of a thermostatic element situated inproximity to said gas pipe WhQT$= by the heat of the flame from saidpipe Will cause an expansion of said element, a rock ing elementactuated by the expansion and contraction of said thermostatic element,a lever secured at one end to said stop cock and provided with alongitudinal slot adjacent its other end a rod pivoted to said rockingelement and depending therefrom and having its lower end positionedwithin said slot, and a pin carried by said rod and engageable with freeend of said lever to move the same to a closing position When saidthermostatic element contracts, said pin be ing adjustable into saidslot to permit of a swinging of said lever to a position to open thestop cock and being also movable, by gravity, to its operative positionin engagement with the end of said lever upon the expansion of saidthermostatic element.

in testimony whereof, I afiix my signature, in the presence of twoWitnesses.

WALTER O. STANLEY.

Witnesses:

EDNA C. @Roorr,

STANLEY.

